Warning!!! Use at your own risk! Modifying files on your flash can be dangerous if you don't know what you're doing!
Tested on PS3 3.55 (kmeaw, if you need me to be more specific). It should work on any firmware though.
This enables writing to the flash, which is vital to the operation of the console's operating system - use this at your own risk.
This homebrew was created using the PSL1GHT SDK.
edit: in comparison with FreeFlash: this is ONLY using two syscalls (one for mounting, one for unmounting) - simple, efficient, and works.
This program will mount a writable dev_flash into /dev_blind, which can be used by various PS3 FTP servers and file managers.
THIS WILL ENABLE WRITE ABILITY ON dev_flash, WHICH IS VITAL TO THE OPERATION OF THE PLAYSTATION 3 SOFTWARE.
Use this at your own risk.